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Show 220 MR. F. E. BEDDARD ON AN [Mar. 5, specimens, the penes are attached to the ventral surface of both the xviiith and the xixth segments. In the present worm they are as clearly attached to the ventral surface of segments xviii., xix., and xx. This can be ascertained by the presence of lateral couples of setae corresponding to the ventral area, which is devoid of setae. There are three pairs on each side, the ventral setae being missing or probably transferred to the penis, which is simply a pulled-out region of the ventral body-wall. Text-fig. 60. -S i Penis-like appendage of Alma sp. inc. S, sucker. On the ventral surface of the penis are two suckers, which are quite conspicuous. The first is near to the base of the organ, the second at the opposite extremity at the bottom of the deep pit in which the penis ends. There were no suckers in intermediate positions such as are possessed by A. millsoni. In the arrangement of these suckers the present species seems to come near to |